412 lines
11 KiB
Perl
412 lines
11 KiB
Perl
BEGIN {
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push @INC, './lib';
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}
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use strict;
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my %alias_to = (
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U32 => [qw(PADOFFSET STRLEN)],
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I32 => [qw(SSize_t long)],
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U16 => [qw(OPCODE line_t short)],
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U8 => [qw(char)],
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);
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my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
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# Nullsv *must* come first in the following so that the condition
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# ($$sv == 0) can continue to be used to test (sv == Nullsv).
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my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no);
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my (%alias_from, $from, $tos);
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while (($from, $tos) = each %alias_to) {
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map { $alias_from{$_} = $from } @$tos;
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}
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my $c_header = <<'EOT';
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/*
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* Copyright (c) 1996-1999 Malcolm Beattie
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* This file is autogenerated from bytecode.pl. Changes made here will be lost.
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*/
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EOT
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my $perl_header;
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($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
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unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";
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#
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# Start with boilerplate for Asmdata.pm
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#
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open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
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print ASMDATA_PM $perl_header, <<'EOT';
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package B::Asmdata;
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use Exporter;
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@ISA = qw(Exporter);
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@EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
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our(%insn_data, @insn_name, @optype, @specialsv_name);
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EOT
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print ASMDATA_PM <<"EOT";
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\@optype = qw(@optype);
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\@specialsv_name = qw(@specialsv);
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# XXX insn_data is initialised this way because with a large
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# %insn_data = (foo => [...], bar => [...], ...) initialiser
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# I get a hard-to-track-down stack underflow and segfault.
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EOT
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#
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# Boilerplate for byterun.c
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#
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open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
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print BYTERUN_C $c_header, <<'EOT';
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#define PERL_NO_GET_CONTEXT
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#include "EXTERN.h"
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#include "perl.h"
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#define NO_XSLOCKS
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#include "XSUB.h"
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#ifdef PERL_OBJECT
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#undef CALL_FPTR
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#define CALL_FPTR(fptr) (pPerl->*fptr)
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#undef PL_ppaddr
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#define PL_ppaddr (*get_ppaddr())
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#endif
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#include "byterun.h"
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#include "bytecode.h"
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static int optype_size[] = {
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EOT
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my $i = 0;
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for ($i = 0; $i < @optype - 1; $i++) {
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printf BYTERUN_C " sizeof(%s),\n", $optype[$i], $i;
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}
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printf BYTERUN_C " sizeof(%s)\n", $optype[$i], $i;
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print BYTERUN_C <<'EOT';
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};
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static SV *specialsv_list[4];
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static int bytecode_iv_overflows = 0;
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static SV *bytecode_sv;
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static XPV bytecode_pv;
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static void **bytecode_obj_list;
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static I32 bytecode_obj_list_fill = -1;
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void *
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bset_obj_store(pTHXo_ void *obj, I32 ix)
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{
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if (ix > bytecode_obj_list_fill) {
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if (bytecode_obj_list_fill == -1)
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New(666, bytecode_obj_list, ix + 1, void*);
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else
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Renew(bytecode_obj_list, ix + 1, void*);
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bytecode_obj_list_fill = ix;
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}
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bytecode_obj_list[ix] = obj;
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return obj;
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}
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void
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byterun(pTHXo_ struct bytestream bs)
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{
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dTHR;
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int insn;
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EOT
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for (my $i = 0; $i < @specialsv; $i++) {
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print BYTERUN_C " specialsv_list[$i] = $specialsv[$i];\n";
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}
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print BYTERUN_C <<'EOT';
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while ((insn = BGET_FGETC()) != EOF) {
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switch (insn) {
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EOT
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my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);
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while (<DATA>) {
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chop;
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s/#.*//; # remove comments
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next unless length;
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if (/^%number\s+(.*)/) {
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$insn_num = $1;
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next;
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} elsif (/%enum\s+(.*?)\s+(.*)/) {
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create_enum($1, $2); # must come before instructions
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next;
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}
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($insn, $lvalue, $argtype, $flags) = split;
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$insn_name[$insn_num] = $insn;
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$fundtype = $alias_from{$argtype} || $argtype;
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#
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# Add the case statement and code for the bytecode interpreter in byterun.c
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#
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printf BYTERUN_C "\t case INSN_%s:\t\t/* %d */\n\t {\n",
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uc($insn), $insn_num;
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my $optarg = $argtype eq "none" ? "" : ", arg";
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if ($optarg) {
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printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
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}
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if ($flags =~ /x/) {
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print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
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} elsif ($flags =~ /s/) {
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# Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
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print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
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}
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elsif ($optarg && $lvalue ne "none") {
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print BYTERUN_C "\t\t$lvalue = arg;\n";
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}
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print BYTERUN_C "\t\tbreak;\n\t }\n";
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#
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# Add the initialiser line for %insn_data in Asmdata.pm
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#
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print ASMDATA_PM <<"EOT";
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\$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
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EOT
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# Find the next unused instruction number
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do { $insn_num++ } while $insn_name[$insn_num];
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}
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#
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# Finish off byterun.c
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#
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print BYTERUN_C <<'EOT';
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default:
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Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
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/* NOTREACHED */
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}
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}
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}
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EOT
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#
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# Write the instruction and optype enum constants into byterun.h
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#
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open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
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print BYTERUN_H $c_header, <<'EOT';
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struct bytestream {
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void *data;
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int (*pfgetc)(void *);
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int (*pfread)(char *, size_t, size_t, void *);
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void (*pfreadpv)(U32, void *, XPV *);
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};
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enum {
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EOT
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my $add_enum_value = 0;
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my $max_insn;
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for ($i = 0; $i < @insn_name; $i++) {
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$insn = uc($insn_name[$i]);
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if (defined($insn)) {
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$max_insn = $i;
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if ($add_enum_value) {
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print BYTERUN_H " INSN_$insn = $i,\t\t\t/* $i */\n";
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$add_enum_value = 0;
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} else {
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print BYTERUN_H " INSN_$insn,\t\t\t/* $i */\n";
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}
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} else {
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$add_enum_value = 1;
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}
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}
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print BYTERUN_H " MAX_INSN = $max_insn\n};\n";
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print BYTERUN_H "\nenum {\n";
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for ($i = 0; $i < @optype - 1; $i++) {
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printf BYTERUN_H " OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
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}
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printf BYTERUN_H " OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;
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print BYTERUN_H <<'EOT';
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extern void byterun(pTHXo_ struct bytestream bs);
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#define INIT_SPECIALSV_LIST STMT_START { \
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EOT
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for ($i = 0; $i < @specialsv; $i++) {
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print BYTERUN_H "\tPL_specialsv_list[$i] = $specialsv[$i]; \\\n";
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}
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print BYTERUN_H <<'EOT';
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} STMT_END
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EOT
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#
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# Finish off insn_data and create array initialisers in Asmdata.pm
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#
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print ASMDATA_PM <<'EOT';
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my ($insn_name, $insn_data);
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while (($insn_name, $insn_data) = each %insn_data) {
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$insn_name[$insn_data->[0]] = $insn_name;
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}
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# Fill in any gaps
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@insn_name = map($_ || "unused", @insn_name);
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1;
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__END__
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=head1 NAME
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B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode
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=head1 SYNOPSIS
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use Asmdata;
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=head1 DESCRIPTION
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See F<ext/B/B/Asmdata.pm>.
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=head1 AUTHOR
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Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
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=cut
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EOT
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__END__
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# First set instruction ord("#") to read comment to end-of-line (sneaky)
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%number 35
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comment arg comment_t
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# Then make ord("\n") into a no-op
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%number 10
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nop none none
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# Now for the rest of the ordinary ones, beginning with \0 which is
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# ret so that \0-terminated strings can be read properly as bytecode.
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%number 0
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#
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#opcode lvalue argtype flags
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#
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ret none none x
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ldsv bytecode_sv svindex
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ldop PL_op opindex
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stsv bytecode_sv U32 s
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stop PL_op U32 s
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ldspecsv bytecode_sv U8 x
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newsv bytecode_sv U8 x
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newop PL_op U8 x
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newopn PL_op U8 x
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newpv none PV
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pv_cur bytecode_pv.xpv_cur STRLEN
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pv_free bytecode_pv none x
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sv_upgrade bytecode_sv char x
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sv_refcnt SvREFCNT(bytecode_sv) U32
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sv_refcnt_add SvREFCNT(bytecode_sv) I32 x
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sv_flags SvFLAGS(bytecode_sv) U32
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xrv SvRV(bytecode_sv) svindex
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xpv bytecode_sv none x
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xiv32 SvIVX(bytecode_sv) I32
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xiv64 SvIVX(bytecode_sv) IV64
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xnv SvNVX(bytecode_sv) NV
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xlv_targoff LvTARGOFF(bytecode_sv) STRLEN
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xlv_targlen LvTARGLEN(bytecode_sv) STRLEN
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xlv_targ LvTARG(bytecode_sv) svindex
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xlv_type LvTYPE(bytecode_sv) char
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xbm_useful BmUSEFUL(bytecode_sv) I32
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xbm_previous BmPREVIOUS(bytecode_sv) U16
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xbm_rare BmRARE(bytecode_sv) U8
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xfm_lines FmLINES(bytecode_sv) I32
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xio_lines IoLINES(bytecode_sv) long
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xio_page IoPAGE(bytecode_sv) long
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xio_page_len IoPAGE_LEN(bytecode_sv) long
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xio_lines_left IoLINES_LEFT(bytecode_sv) long
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xio_top_name IoTOP_NAME(bytecode_sv) pvcontents
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xio_top_gv *(SV**)&IoTOP_GV(bytecode_sv) svindex
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xio_fmt_name IoFMT_NAME(bytecode_sv) pvcontents
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xio_fmt_gv *(SV**)&IoFMT_GV(bytecode_sv) svindex
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xio_bottom_name IoBOTTOM_NAME(bytecode_sv) pvcontents
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xio_bottom_gv *(SV**)&IoBOTTOM_GV(bytecode_sv) svindex
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xio_subprocess IoSUBPROCESS(bytecode_sv) short
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xio_type IoTYPE(bytecode_sv) char
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xio_flags IoFLAGS(bytecode_sv) char
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xcv_stash *(SV**)&CvSTASH(bytecode_sv) svindex
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xcv_start CvSTART(bytecode_sv) opindex
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xcv_root CvROOT(bytecode_sv) opindex
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xcv_gv *(SV**)&CvGV(bytecode_sv) svindex
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xcv_file CvFILE(bytecode_sv) pvcontents
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xcv_depth CvDEPTH(bytecode_sv) long
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xcv_padlist *(SV**)&CvPADLIST(bytecode_sv) svindex
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xcv_outside *(SV**)&CvOUTSIDE(bytecode_sv) svindex
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xcv_flags CvFLAGS(bytecode_sv) U16
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av_extend bytecode_sv SSize_t x
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av_push bytecode_sv svindex x
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xav_fill AvFILLp(bytecode_sv) SSize_t
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xav_max AvMAX(bytecode_sv) SSize_t
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xav_flags AvFLAGS(bytecode_sv) U8
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xhv_riter HvRITER(bytecode_sv) I32
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xhv_name HvNAME(bytecode_sv) pvcontents
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hv_store bytecode_sv svindex x
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sv_magic bytecode_sv char x
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mg_obj SvMAGIC(bytecode_sv)->mg_obj svindex
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mg_private SvMAGIC(bytecode_sv)->mg_private U16
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mg_flags SvMAGIC(bytecode_sv)->mg_flags U8
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mg_pv SvMAGIC(bytecode_sv) pvcontents x
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xmg_stash *(SV**)&SvSTASH(bytecode_sv) svindex
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gv_fetchpv bytecode_sv strconst x
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gv_stashpv bytecode_sv strconst x
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gp_sv GvSV(bytecode_sv) svindex
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gp_refcnt GvREFCNT(bytecode_sv) U32
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gp_refcnt_add GvREFCNT(bytecode_sv) I32 x
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gp_av *(SV**)&GvAV(bytecode_sv) svindex
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gp_hv *(SV**)&GvHV(bytecode_sv) svindex
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gp_cv *(SV**)&GvCV(bytecode_sv) svindex
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gp_file GvFILE(bytecode_sv) pvcontents
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gp_io *(SV**)&GvIOp(bytecode_sv) svindex
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gp_form *(SV**)&GvFORM(bytecode_sv) svindex
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gp_cvgen GvCVGEN(bytecode_sv) U32
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gp_line GvLINE(bytecode_sv) line_t
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gp_share bytecode_sv svindex x
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xgv_flags GvFLAGS(bytecode_sv) U8
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op_next PL_op->op_next opindex
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op_sibling PL_op->op_sibling opindex
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op_ppaddr PL_op->op_ppaddr strconst x
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op_targ PL_op->op_targ PADOFFSET
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op_type PL_op OPCODE x
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op_seq PL_op->op_seq U16
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op_flags PL_op->op_flags U8
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op_private PL_op->op_private U8
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op_first cUNOP->op_first opindex
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op_last cBINOP->op_last opindex
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op_other cLOGOP->op_other opindex
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op_children cLISTOP->op_children U32
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op_pmreplroot cPMOP->op_pmreplroot opindex
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op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot svindex
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op_pmreplstart cPMOP->op_pmreplstart opindex
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op_pmnext *(OP**)&cPMOP->op_pmnext opindex
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pregcomp PL_op pvcontents x
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op_pmflags cPMOP->op_pmflags U16
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op_pmpermflags cPMOP->op_pmpermflags U16
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op_sv cSVOP->op_sv svindex
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op_padix cPADOP->op_padix PADOFFSET
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op_pv cPVOP->op_pv pvcontents
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op_pv_tr cPVOP->op_pv op_tr_array
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op_redoop cLOOP->op_redoop opindex
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op_nextop cLOOP->op_nextop opindex
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op_lastop cLOOP->op_lastop opindex
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cop_label cCOP->cop_label pvcontents
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cop_stashpv cCOP pvcontents x
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cop_file cCOP pvcontents x
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cop_seq cCOP->cop_seq U32
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cop_arybase cCOP->cop_arybase I32
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cop_line cCOP line_t x
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cop_warnings cCOP->cop_warnings svindex
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main_start PL_main_start opindex
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main_root PL_main_root opindex
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curpad PL_curpad svindex x
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